// g++ -O3 -DNDEBUG -DMATSIZE=<x> benchmark.cpp -o benchmark && time ./benchmark

#include <iostream>

#include <Eigen/Core>

#ifndef MATSIZE
#define MATSIZE 3
#endif

using namespace std;
using namespace Eigen;

#ifndef REPEAT
#define REPEAT 40000000
#endif

#ifndef SCALAR
#define SCALAR double
#endif

int
main(int argc, char* argv[])
{
	Matrix<SCALAR, MATSIZE, MATSIZE> I = Matrix<SCALAR, MATSIZE, MATSIZE>::Ones();
	Matrix<SCALAR, MATSIZE, MATSIZE> m;
	for (int i = 0; i < MATSIZE; i++)
		for (int j = 0; j < MATSIZE; j++) {
			m(i, j) = (i + MATSIZE * j);
		}
	asm("#begin");
	for (int a = 0; a < REPEAT; a++) {
		m = Matrix<SCALAR, MATSIZE, MATSIZE>::Ones() + 0.00005 * (m + (m * m));
	}
	asm("#end");
	cout << m << endl;
	return 0;
}
